This is a board that allows reading the temperature through a thermocouple sensor and controlling 2 external loads such as fans, Peltier coolers or others. it comes with the thermocouple sensor.See more details

3 Axis Encoder Counter Arduino ShieldThis shield is a 3 channel interface for external encoders . It keeps track of the pulses that are sent from encoders.It offloads all the computation of keeping track of the encoders to the chip. The interface between the shield and the Arduino board is SPI .It includes example code that can read all 3 channels.It is based on the LS7366R chip .See more details

This small and powerful solid state relay is a versatile tool that can be used as a regular relay or a voltage shifter.Because it does not have mechanical contacts it can drive the load very fast in kilohertz domain .It has been used to drive small motors with PWM signal , in audio equipment , to control a load at 24 volts with 3.3 voltage See More details